# At t1 = 1.00 s, the acceleration of a particle moving at constant speed in counterclockwise circular motion isa1→=(2.00m/s2)i^+(8.00m/s2)j^At t2 = 3.00 s (less than one period later), the acceleration isa2→=(8.00m/s2)i^−(2.00m/s2)j^The period is more than 2.00 s. What is the radius of the circle?

Displacement, Velocity and Acceleration

In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.

Linear Displacement

The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.

At t1 = 1.00 s, the acceleration of a particle moving at constant speed in counterclockwise circular motion is

a

1

→

=

(

2.00

m/s

2

)

i

^

+

(

8.00

m/s

2

)

j

^

At t2 = 3.00 s (less than one period later), the acceleration is

a

2

→

=

(

8.00

m/s

2

)

i

^

−

(

2.00

m/s

2

)

j

^

The period is more than 2.00 s. What is the radius of the circle?

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